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Hi Everyone, On the 2nd of December Rob Cason wrote; > >Jason, > >I agree with Richard Taylor. NONE of our group has been bent on Trimix so far. >If you are having a 2% - 10% hit rate, then its time you re-examined your dive >planning and decompression protocols. You are obviously doing something WRONG! What part of Richard's post do you agree with, the bit where he says I've made all this up because I have a small dick? I'm very glad that none of your group have been hit. As I understand your earier discussions with me, your group has a *total* of 90 dives. My understanding of this is that most of them have been conducted at *less* than 60 m. From what I have heard around the industry very few dives have been done between 60 and 72 metres (72 m being the depth of the Encounter, the deepest Sydney wreck for which you have the marks) and none below that depth. (trip to Honiara excluded) The group I have been diving with has made an average of 6 dives per week on the Koputi which lies in 79 m. They have been doing this for over a year. You can tell me about "doing it right" when you have demonstrated that you can do it at all. >Your unacceptable hit rate may lead to further NSW Governmenrt intervention in >mix diving. The NSW Occuptaional Health and Safety Act 1983 was amended in >June this year to close the loophole so that recreational divers under certain >circumstances are subject to the Act. These circumstances include any >situation that involves a workplace eg. dive stores supplying mix, instructors >teaching mix programs and may even extend to charter boats. You seem to have missed the bit where I said that this hit rate seems to be similar on air and mix. I was asking about dives in the 80 odd metre range. >WorkCover NSW are desperately trying to justify their mix stance from October >1991 to March 1994 as they are under investigation by the NSW Ombudsman. You >are giving them exactly the justification they need! If you are implying that they might find out that diving surface oriented gas is somewhat dangerous, I think they might already know!!! It has been virtually abandoned by the commercial diving industry because it isn't very safe. Oceaneering don't set up sat systems to impress the girls, they do it because it is the safest and cheapest (in the medium/long term) way of operating in these depths. Are you, as the head of IANTD Australia, trying to make out that this type of diveing can be conducted "risk free"? >Please sort out your problems before your unacceptable hit rate stops ALL of us >from diving mix in NSW (and maybe elsewhere in Australia and NZ) That was the reason for my original post. To ask those who *knew* how to do it right, how they managed to get the fantastic safety records that they have been claiming. It seems that they do this by not counting minor symptoms as a "hit". If we did this then our hit rate would fall to below 1 percent. >Rob Cason >IANTD Australasia > >"If you are going to do it, get is right!" Cheers Jason (with a small one) PS Our "unacceptable hit rate" appears to be lower than the DCIEM tables rate for the depths and times of these exposures. These are the tables recommended by WorkCover.
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